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Modeling long carbon-chain species formation with porous multiphase models

文献类型：期刊论文

作者Song, Ziwen1; Chang, Qiang1; Meng, Qingkuan1; Zhang, Xia2
刊名ASTRONOMY & ASTROPHYSICS
出版日期2024-10-25
卷号691页码:A40
关键词astrochemistry ISM: abundances ISM: molecules
ISSN号0004-6361
DOI10.1051/0004-6361/202450647
产权排序2
英文摘要Context. Recent studies show that multiphase models trap too many volatile species such as CH4 inside ice mantles, so they usually underestimate the abundances of long carbon-chain species observed toward warm carbon-chain chemistry (WCCC) sources. Aims. We propose a new multiphase model that allows more volatile species to diffuse out of the ice mantle upon warming. The new multiphase model is used to study the synthesis of long carbon-chain molecules in WCCC sources. Methods. We included porous structure in the ice mantles. The porous structure can enlarge the active layers of ice mantles so that fewer volatile species are trapped. The porous multiphase models were simulated using an accelerated Gillespie algorithm. Results. The abundances of long carbon-chain species predicted by the porous multiphase models can be more than one order of magnitude higher than those predicted by the multiphase model at temperatures relevant to WCCC sources. Moreover, the porous multiphase models predict more abundant long carbon-chain species as the porosity of the ice mantles increases. On the other hand, the two-phase model still estimates higher long carbon-chain species abundances than the porous multiphase models do. The abundances of long carbon-chain species predicted by our porous multiphase models agree reasonably well with observations toward three WCCC sources, L483, L1527, and B228. Conclusions. Our porous multiphase model solves the problem of too many volatile species being trapped in ice mantles in the multiphase models.
WOS关键词GAS-GRAIN CHEMISTRY ; MONTE-CARLO TREATMENT ; INTERSTELLAR ICE ; PROTOSTELLAR CORES ; BULK DIFFUSION ; SIMULATIONS ; PRESTELLAR ; MOLECULES ; CLOUDS ; PHASE
资助项目National Natural Science Foundation of China[12173023] ; National Natural Science Foundation of China[12203091]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001342109500025
出版者EDP SCIENCES S A
资助机构National Natural Science Foundation of China
源URL[http://ir.xao.ac.cn/handle/45760611-7/7145]  
专题天体化学研究团组
通讯作者Chang, Qiang
作者单位1.Shandong Univ Technol, Sch Phys & Optoelect Engn, 266 West Xincun Rd, Zibo 255000, Peoples R China
2.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Song, Ziwen,Chang, Qiang,Meng, Qingkuan,et al. Modeling long carbon-chain species formation with porous multiphase models[J]. ASTRONOMY & ASTROPHYSICS,2024,691:A40.
APA Song, Ziwen,Chang, Qiang,Meng, Qingkuan,&Zhang, Xia.(2024).Modeling long carbon-chain species formation with porous multiphase models.ASTRONOMY & ASTROPHYSICS,691,A40.
MLA Song, Ziwen,et al."Modeling long carbon-chain species formation with porous multiphase models".ASTRONOMY & ASTROPHYSICS 691(2024):A40.

入库方式： OAI收割

来源：新疆天文台

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